字符串{{ greet }}
<br>
<br>
整数{{ num }}
<br>
<br>
列表{{ li.0 }}
<br>
<br>
字典{{ dic.name }}

<br>
<br>
循环{% for item in li %}
    {{ item }}
{% endfor %}

<br>
<br>
模板包含
{% include 'head.html' %}
